[Bug 1054815] [NEW] grub installer for 12.04.1 system installer is easily confused

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When installing 12.04.1(using the third install option that brings up
the partition too) I merged two partitions on a non-removeable /dev/sdb,
the result becoming mount point /.  At least one of the original
partitions contained an old ubuntu installation, maybe both did.  The
existing grub installation may have been on one of those partitions or
grub may have been associated with yet another partition that was
capable of booting into one or both of the old ubuntus (I don't remember
which way it was).  So in some way the existing grub would have been at
least partially broken by the merging of the partitions.  I figured
"what the heck" the install can easily figure all this out and install a
working grub.  No it can't.  With repeated installs of 12.04.1 I'd
either get "grub rescure>" or sometimes a partition UID not found error
(one of the now-gone partitions' UID names).  Each time, a Boot-Repair
CD from sourceforge restored grub to working condition with three button
clicks.  Note: one of those clicks asked if /dev/sdb was a removeable
disk.  Ubuntu never asked that.  I wonder if Boot-Repair uses that info
to correctly handle some condition that maybe ubuntu doesn't.  In any
case, the ubuntu installer gets terminally confused where Boot-Repair
works fine.  Seems like looking into Boot-Repair is a good place to
start in improving the installer.

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment
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grub installer for 12.04.1 system installer is easily confused
https://bugs.launchpad.net/bugs/1054815
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